Under normal circumstances, there is generally no after-effects of mini-needle knife. However, there may be some risks, such as possible damage to the surrounding normal tissues due to improper handling, or wound infection due to inadequate sterilization, as well as risks of tissue fragility and aggravation of local tissue adhesions due to repeated small-needle knife treatments. Small needles are therapeutic instruments that are thicker and longer in shape than normal acupuncture needles and have a narrow, sharp blade at the tip. They are generally used for diseases with tissue adhesions due to chronic inflammation, such as frozen shoulder, tennis elbow, and lumbar disc herniation. By quickly dissociating the adhesive fibers at the lesion and unblocking the meridians to achieve the therapeutic purpose, the knife has the advantages of less trauma, quicker effect and fewer side effects. The knife needs to be operated by a professional doctor, if you feel uncomfortable, please consult a doctor in time.